Hoisting drum



1,539,391 .1. H. HERMAN HOISTING DRUM H o 'i inal Filed June 15, 1921 2:! T THMERM LQMMM M attozmzq Patented May 26, 1925.

v UNITED STATES PATENT OFFICE.

m; 1:. HERMAN, or LOS ANGELES, cALIronn-IA.

HOISTING DRUM.

.Origlnalapplloa'tion filed June 13,1921, Serial No. 477,292. Divided and this application filed Key 1,

' 1922. Serial No. 557,741.

To all whom it may concern: 1

Be it known that I, JOHN H. HERMAN, a

, citizen of the 'Uni'ted -istates, residing at Les Angeles,-Los Angeles County, California, have invented a certain new and useful Improvement; in Hoisting Drums, of which the following is a full, clear, and exact descri tion, such as will "enable. others skill in the artto which it appertains to make and use the same. 7

My invention relates to an improvement in hoisting drums for'the purposev of reeling and unreeling cable, and while .it has particular application to hoisting drums used in well r lling, it is obvious that it has a wide field of use and is applicable for other purposes. This invention comprises a divicoolin whereby sion of my prior application, Serial Number 477,292,'filed June 13th, 1921.

g An object of my invention is to provide'a hoisting drum having a brake drum and brake-thereon andmeans of cooling the said brake drum during the operation thereof.

Another object is to provide a cooling system'for such a brake drum whereinr'the g fluid may be renewed. from tiirie to time as desired. i

' Another object is to'provide a means of supporting the brakeband upon the drum the most efiicient operation thereof may be secured.

Referring to the drawing herewith where in like numerals of reference are applied to like parts in both. ,the views, Fig. 1 is a top plan view of a hoisting drum emb0dying' my invention, one half of said drum .rceled. Centrally of the hub 4 is an axial trunnion that is adapted to be supported within a bearingblock 7. This block 7 is in turn supported upon an end beam 8 constituting the frame of the machine.

On the other end of the drum is a similar tending pin 25.

hub 34, having an outwardly projecting shaft 9 to which is keyed a sprocket Wheel 10 by means of as key 11. This sprocket wheel furnishes a driv'in connection with some source of power. paced from the sprocket wheel, within the frame 8', in which the stub shaft is supported, is a second plate or flange 5 limiting the reeling portion of the drum.

Between this plate and the supporting beam 8 is secured a hollow brake drum 12. This drum is of the usual shape being a short cylinder, the outer surface of which furnishes a contact with a brake lining 13 extending around the lower drum, and the ends thereof spaced slightly apart at the upper end as shown at 14 in Fig. 2. Outside of this brake lining is a brake band 15., This brake band is made up of a hoop of resilient metal, such as steel, entirely surrounding the brake liningqmd so arran' d as to force the said lining against the drum. To accomplish this, as shown particularly in Fig. 2, each end of the brake band has .a plate 16 secured theretoand on this plate are upwardly extending lugs 17 spaced y apart to provide an attachment for the brake lever This lever-comprises a handle 18 heat at its forwardend into" the usual bell crank form, theshort arm of which is pivoted at 21 to thebent )ortion of the lever 18 and is attached by a justable means to the plate 16 This attachment comprises a threaded end on. the link20 to which are secured spaced nuts' 22'and 23.. Included between these two-nuts upon the link is a trnnsversemember pivoted. at Q L-to the upstanding lugs on the plate 16.

- The lower side of the brake band has attached thereto a plate having a laterally ex: The two ends of the pin are adapted to fit within slots 26 in the' plumber-blocks 27. There may be two'of these blocks secured upon the beamS and the pi'n 25 may be received at each end in one'of' these two blocks. A screw 28 is. introduced through the support 8' and the lower end of theslot in the plumber block to contact with the pin 25 and support the same in adjusted vertical position. Thus when the brake band is loosened there would ordinarily be a tendency of the brake band to drop downwardly so that the lower half thereof would be out of contact with the lining. The adjusting of-the set screw 28 will serve to prevent this movement and retain the brake band in operative position at all times.

The hollow brake drum includes a central chamber 29 for cooling fluid. A lateral opening or manhole 30 is formed in the side of the drum adjacent the hub. It is closed by a plug 31 held in position by Ineans'of a spring 32 on the inner side of the chamber. By means of this 0 ening water or other cooling liquid may c introduced into the brake drum as desired An opening 33 of small diameter is formed on the opposite wall of the chamber to form an outlet for steam which'may be generated as the cooling liquid becomes heated.

In the operation of my device the drum may be rotated as desired and the cooling liquid within the drum will be thrown outwardly by centrifu al force against the inner surface of the (from, in such position as to cool the surface which becomesheated by friction due to the brake band. When the drum is at rcst liquid-will settle in the lower part of the chamber, but upon operation will immediately be thrown outwardly where it will be most eflective. It will thus serve to keep the drum cool at the point where the cooling is required and can not come in'contaet with the brake lining and thus serve to reduce the effectiveness of the brake. A small quantity of cooling liquid in this system of cooling will last for long periods of time with no care on the part of the operator, and the safety of the devicewill be reatly increased due to the fact that the'coo ing li uid cannot eflect the operation'tof the bra e.

Having thus described my invention, what I claim as new and desire to protect by Let- 4 ters Patent is: I

1. In a hoistin drum, a hollow cylindrical brake drum, t e intericd of which forms a reservoir, a brake band on said drum, means to regulate the pressure on said brake band, and means to introduce a cooling fluid within said reservoir so as to partly fill the interior thereof, whereby the fluid will be thrown into contact with the inner surface of said drum when said drum rotates.

2. In a hoisting drum, a. hollow cylindrical brake drum having a liquid chamber therein, a brake band on said drum, -means to regulate the pressure of said brake band on said drum, said chamber having an auto- 17' tically closing opening therein adjacent the cen er thereof.

3. In a hoisting drum, a hollow brake drum, a fluid chamber inside said drum, said chamber having a steam outlet and an automatically closing inlet port therein adjacent the center thereof, a brake band on said drum d means to regulate said brake band onsaid drum.

4. Ina hoisting drum, a. hollow cylindrical brake drum forming a reservoir, a brake band on said drum, and means of filling said reservoir with fluid, whereby said fluid will be applied to the inner surface of said drum out of contactwith said hi ake band for cooling purposes.

In testimony whereof I hereunto afiix my signature this the 14th dayof April, A, D. 1922.

J. H. HERMAN. 

